Photochemical Smog

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‘Smog’ is made up of two words, what are they?

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small + f og smell + mog smoke + f og stupid + monk

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Smog The word ‘smog’ comes from two words:

smoke and fog. Characterize visible combination of smoke

and fog

Photochemical smog is a mixture of pollutants, what are they?

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nitrogen

dioxide

benzene ozone aldehyde unreacted

carbon

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Composition Nitrogen oxides Ozone Aldehydes Unreacted carbon Particular matter Peroxyaceyl nitrate (PAN)

Temperature Inversion

Formation

What colour is photochemical smog?

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brown grey blue green

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Colour Nitrogen dioxide is responsible for the bro

wnish colour of the haze. The particulates formed and the brown col

our of nitrogen dioxide give the air a dirty, ‘smoggy’ appearance.

What are the disadvantages of having photochemical smog?

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a b c d e

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a. headaches b. eye, nose and throat irritation c. impaired lung function

d. coughing and wheeling e. damaging plants

Effects Effects on human health

Headaches Eyes, nose and throat irritations Impaired lung function Coughing and wheezing

Damage to materials Ozones causes rubber to deteriorate

Effects on the atmosphere Reduce visibility

Toxicity to plants